AP Statistics Review 2

Front

What does random scatter in the residuals indicate about a linear model?

Back

Random scatter in the residuals indicates that a linear model is appropriate for the data.

Tags

CCSS.HSS.ID.B.6B

Front

What does a correlation coefficient near 1 or -1 signify?

Back

A correlation coefficient near 1 or -1 signifies a very strong association between two variables.

Tags

CCSS.HSS.ID.B.5

Front

Does changing the units of measurement for x or y affect the correlation coefficient?

Back

No, changing the units of measurement for x or y does not change the correlation coefficient.

Front

How can you describe a distribution that is skewed slightly left?

Back

A distribution that is skewed slightly left has a longer tail on the left side and is centered around a value, indicating that most data points are on the right.

Front

What is the interquartile range (IQR) used for?

Back

The interquartile range (IQR) is used to identify outliers in a data set.

Tags

CCSS.6.SP.B.5C

Front

What is the linear regression equation for a given set of data?

Back

The linear regression equation describes the relationship between two variables, typically in the form y = mx + b.

Tags

CCSS.8.EE.B.5

Front

What does the slope of a linear regression equation represent?

Back

The slope represents the average change in the dependent variable for each one-unit increase in the independent variable.

Tags

CCSS.HSF.LE.B.5

Front

What does a slope of 40 in a regression equation indicate in context?

Back

A slope of 40 indicates a gain of 40 grams per week.

Tags

CCSS.HSF.LE.B.5

Front

What is the definition of an outlier?

Back

An outlier is a data point that is significantly different from the other observations in a dataset.

Front

How do you calculate the linear regression equation from data?

Back

You calculate the linear regression equation using statistical methods such as least squares to minimize the sum of the squares of the residuals.

Tags

CCSS.8.SP.A.2